Mounting for rectifier plates



May 24, 1932. L." F. BIRD v MOUNTING FOR RECTIFIER PLATES Filed July 26, 1930 'ATTCRNEY Patented May 24, 19 32.

UNITED s'ra'ras PATENT OFFICE] LESTER F. BIRD, OF NEWARK, NEW JERSEY, ASSIGNOR TO HANOVIA CHEMICAL AND MANUFACTURING COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW JERSEY MOUNTING FOB RECTIFIER PLATES Application filed July 26,

This invention relates to improvements in mountings for rectifier units in which the lates are spaced and suspended so that there is free circulation of air throughout the units.

The rectifier plates of the type herein considered usually consist of flat oxidized copper plates with collector plates pressed against the outside surfaces; The collector plates 19 make contact with the oxide or a metallic fihn enabling the use of the rectifier plate in a circuit.

7 The usual method of mounting groups of these plates is to provide a bolt long enough m to reach through the assembly, an insulating tube passing over the bolt. r

The individual plates with the collector plates attached to their sides are; assembled on the bolt with tubular spacers between the plates. The bolt is then tightened down on the plates, to hold them tightly in position.

The electrical connections are then made between the collector plates and the copper in accordance with the desired method of assembly depending upon whether the plates are to be used in series or in parallel.

It is undesirable from an efiiciency standpoint for rectifier plates to have a hole in them, because holes provide more edges to produce leakage currents. Moreover, such a mounting is not applicable to large plates, because it is impossible to secure sufiicient strength for a good mounting with such an arrangement. a

It is an object of this invention to provide a mounting for dry cont-act rectifier plates, by means of which the proper circulation of air is obtained.

A further object is the provision" of a mounting for rectifier plates which obviates the necessity of providing holes in the plates themselves. I

These and other advantageous objects, which will later appear, are accomplished by the simple and practical construction and arrangement of parts hereinafter described and exhibited in the accompanying drawings, forming part hereof, and in which:

50 Figure 1 represents an end view of an asusually of the order of 1.0 to 2.0 inches square .unsuitable'.

sembly of rectifier plates embodying the invention, and 5 I Figure 2 represents a side view sembly shown in Figure 1.

Referring to the drawings, the assembly is shown to include a plurality of rectifying units 5, the mother copper plate 6 of each unit being connected by a wire 8 to the collector plate 7 of the ad'acent unit. The collector plates consist in sheet metal plates folded over each rectifying unit.

Each rectifying unit with itsassociated collector plate is separated from the adjacent unit by a pair of insulating stri s 9, positioned inwardly from the ends 0 the units. At ach end of the assembly are provided insul ting end strips 10, and bolts 11 pass through apertures in the end strips 10 and the strips 9, t e assembly being tightly clamped by means of nuts threaded on the bolts.

As will be seen from the'above description, the plates do not have undesirable holes in them, and the collector plates are not mechanically attached to the individual rectifying units by the use of rivets, grommets, and the like. The assembly affords the maximum possible air circulation through the units since there is minimum interference with the air flow. I This feature is very important, as ample coolin is essential for satisfactor opera-' tion 0 a rectifying unit, as the maximum allowable temperature is definitely fixed and must not be exceeded.

My invention is applicable to any size plates-but finds its chief advantage when the plates are relatively large in size. Plates that are mounted on the bolt assembly are offthe asor possibly circular with these diameters.

The plates that my invention apply to best are those from three inches square u to six inches square or even larger. It is in these sizes that the other types of mounting are The foregoing disclosure is to be regarded as descriptive and illustrative only, and not as restrictive or limitative of the invention, of which obviously an embodiment may be constructed including many modifications without departing from the general scope herein indicated and denoted in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. An assembly for a rectifying device hava ing a pluralit of rectifying units, comprising a pair strips of insulating material separating each unit from the adjacent unit,-

apertures in theends of the strips, bolts passing through the apertures, and means on the bolts for tightly clamping the strips and units.

2. A rectifying device comprising a plurality of unilateral'electrical conductin plates, pairs of strips of insulating material orspacingeach plate from the adjacent plate, said strips having apertures in their ends, bolts passing through the apertures, end strips re- ,ceiving the bolts, and means cooperating with the end strips andbolts to clamp the plates and spacing strips together.

3. 1 An assembly for a rectifying device having a plurality of rectifying units, comprising strips of insulating material separating each unit from the adjacent unit, and means associated with the ends of the strips for tightly clamping the strips and units together, said means'being in no Way connected with the rectifying units.

Thisspecification signed this 21st day of July, 1930. LESTER F. BIRD. 

